+#if wxUSE_ZIPSTREAM
+# if !wxUSE_ZLIB
+# ifdef wxABORT_ON_CONFIG_ERROR
+# error "wxZip requires wxZlib"
+# else
+# undef wxUSE_ZLIB
+# define wxUSE_ZLIB 1
+# endif
+# endif
+# if !wxUSE_ARCHIVE_STREAMS
+# ifdef wxABORT_ON_CONFIG_ERROR
+# error "wxZip requires wxArchive"
+# else
+# undef wxUSE_ARCHIVE_STREAMS
+# define wxUSE_ARCHIVE_STREAMS 1
+# endif
+# endif
+#endif /* wxUSE_ZIPSTREAM */
+